I dont know how it compares to an LT40, but I did the bolt mod on it when I built it. The hold down blocks are the easy part, the structure up front is the difficult part, it heeds a ply doubler to reinforce the F2 for the dowels or tab, some guys use a tab instead of dowels.  To make it work I added a 1/4 plywood block to the back of the leading edge that was just shy of the width of the inside of the fuse, and epoxied it to the back of the leading edge, and the center ribs on the wing, and it extends down about an inch so the dowels have some meat to catch on the fuse.  Where the bolts go I use 1/16th plywood top and bottom and carved the balsa in the trailing edge to make it flush.

It can be done after the plane is built but takes more work.   It has been in a few crashes, but aside from some epoxy on the Fuse, its holding up very well.